from 01.01.2017 until now
VAK Russia 1.6.20
UDC 631.6
UDC 528.88
The result of evaluation of correlation relationship between spectral indices of NDVI vegetation and NDMI humidity calculated on the basis of Earth remote sensing data obtained using Sentinel-2 satellite is shown. The research object is located in the Volgograd region and is an array of drip irrigation system with a total area of approximately 120 hectares, consisting of 11 sites. In 2024, a table carrot culture (Daucus carota) was grown on this territory. The nature of the distribution of random variables NDVI and NDMI does not correspond to the normal (non-Gaussian distribution) law is noted. The Shapiro-Wilkie W-test for all observed values of the NDVI vegetation index is in the range of 0.748... 0.871, for the NDMI humidity index – 0.748... 0.884. This indicates a non-Gaussian distribution with statistical significance (p = 0.01). The Munney-Whitney U-test values are 212... 360. This indicates statistically significant differences (p = 0.01) between the NDVI vegetation index and NDMI humidity index samples. NDVI and NDMI values correlate statistically significantly (Spearman rank coefficient rs = 0.41…0.95) with significance level p = 0.01. The paired Spearman correlation coefficients rs between NDVI and NDMI for one field are in the range of 0.85... 0.95 with a higher significance level p = 0.001.
humidity index, vegetation index, NDMI, NDVI, SAGA GIS, correlation, Spearman's ratio
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